A reaction that occurs in the internal combustion engine is N2(g) + O2(g)  ⇌ 2NO(g) ΔH° =  [a] kJ/mol,  ΔS° = [b] J/mol K From what temperature (in K) does the reaction become spontaneous?  Enter a number to 1 decimal place. (MTS 7/21/2020)  

Choose the true statement. (MTS 7/14/2021)  

Calculate the Kf of M(NH3)2 + from M+(aq) + e- ⇋ M(s)  E0= [x] V M(NH3)2+(aq) + e- ⇋ M(s) + 2NH3(aq)  E0= [y] V You may enter as e notation (e.g. 2.34e6 or 4.56e-4) or enter the whole number (132465780).  Canvas will change it to a number. (MTS 7/18/2020)

Balance the following skeleton reaction in acidic solution (if the coefficient is 1, put 1; if the coefficient is 0, put 0) and identify the oxidizing and reducing agents. For the oxidizing and reducing agent, enter numbers and +/- directly for superscripts and subscripts. (eg. enter HCO3- for HCO3-, Cu2+ for Cu2+) H2S (g) + NO3- (aq)     S8 (s) + NO (g) [1]H2S(g) + [2]NO3-(aq) + [3]H+(aq) + [4]H2O(l)  [5]S8(s) + [6]NO(g) + [7]H+(aq) + [8]H2O(l) (acidic)   Oxidizing agent: [9] Reducing agent: [10]

1.5 The living room [room5]  (1)

1.6 The basement [room6]  (1)

1.3 The kitchen [room3]  (1)

2.8 Voy a comprar pan en la panadería.  (1)

2.3 Hay muchos libros en la biblioteca.  (1)

2.7 Hay muchos monumentos en el museo.  (1)